PUMP GP-PISTON 1657634 - Caterpillar

Required Tools
Illustration 1 g01623868
Tooling group "B" 198-4240 Digital Pressure Indicator Gp
Illustration 2 g02156033
Tooling group (D)
Table 2
Required Tools    
Tool    Item    Part
Number    Description    Qty    
B     198-4240     Digital Pressure Indicator Gp        
    B1     198-4234     Indicator     1    
B2 198-4239     Pressure Sensor
41,368 kPa (6,000 psi)     1    
B3 198-4236     Extension Cable     1    
D     D1     6V-7788     Flow Meter
5 to 60 L/min (2 to 15 US gpm)     1    
D2 8C-6874     Reducer     1    
D3 6V-9746     O-Ring Seal     1    
D4 124-1901     Permanent Coupling     1    
D5 122-6870     Bulk Hydraulic Hose     3 ft    
D6 124-2147     Permanent Coupling     1    
D7 6V-8942     O-Ring Reducer     1    
D8 6V-8556     Nut     1    
D9 6V-8398     O-Ring Seal     1    
F     311-1362     Vacuum Cap     1    Machine Preparation
Stop the engine.
Release the pressure in the hydraulic system. Refer to Testing and Adjusting, "System Pressure - Release".
Attach 311-1362 Vacuum Cap onto the hydraulic tank. Attach an air supply hose onto the assembly. Apply 276 to 414 kPa (40 to 60 psi). This procedure will pull a vacuum on the hydraulic system.
Illustration 3 g02352913
Flow Meter Tool LayoutTooling D (1) Case drain hose (2) Adapter (3) Swing motor (4) Swivel
Install the following tools in accordance with the flow meter tool layout. Refer to Illustration 3.
Disconnect case drain hose (1) from adapter (2) .
Connect the flow meter assembly (D) between adapter (2) and case drain hose (1) .Note: Correct orientation of the flow meter is necessary. The oil flows from swing motor (3) to swivel (4) .
Remove 311-1362 Vacuum Cap .
Illustration 4 g02072074
Pilot Manifold (located below the main control valve) (5) Solenoid valve for swing parking brake (6) Connector
Disconnect connector (6) from the solenoid valve for swing parking brake (5) .Test Procedure
Start the engine.
Place the hydraulic activation control lever in the UNLOCKED position.
Increase the hydraulic oil temperature to 55° 5°C (131° 9°F).
Place the machine controls at the following settings: engine speed dial "10" and AEC switch OFF. Refer to Testing and Adjusting, "Engine Performance - Test (Engine Speed)" for engine rpm settings.
Slowly move the swing joystick and make sure that the swing brake is activated.
Move the swing joystick fully for 1 minute. Measure the case drain oil. Refer to Table 1.
Stop the engine.
Connect connector (6) to the solenoid valve for the swing parking brake (5) .
Repeat this test procedure three times in order to obtain three measurements of case drain oil. For each test procedure, swing the upper structure to a different position.